Is anyone else having this error when syncing from outlook? I have it set to download content from anytime and as it arrives. It hasn't worked since Saturday. I really don't want to have to hard reset my device.

I got the same sync error on one of my two gmail accounts. I hadn't changed any setting, it just stopped working. I deleted the account (on the phone) and added it back. Took a minute and fixed the issue...for now.

Ok, so what can be done to solve this problem when the account having the problem is the main account for the phone? I tried going in an clearing the check box that says to Sync email, saving that, confirming that mail was gone off the phone and then going back and re-checking the box, but it still won't sync.

I'm having the same problem and disabling text backups, unchecking email sync, saving, then checking and saving did nothing.
This is my main account and my twitter and LinkedIn are connected so I am not able to do my job from my phone .
I created a new account and that allowed me to see my email but other connected accounts are not working.
This has been happening for over two months now and it sucks!

My wife's Lumia 920 is getting this error on her primary Hotmail account. I tried disabling the SMS backup and that didn't help (besides which, that is not a solution, as we should not have to disable a feature of the OS just to get the email to work). I am getting pretty fed up with WP8, and Microsoft's painfully slow response to major OS bugs. My WP7.5 device has NEVER had a problem, and now I am worried about having to upgrade.

From what I've found, if you have any items that are in the trash, spam, deleted, or junk, you may encounter this error. From my experience with my Gmail account, the solution to 80C805E2 was to empty any of the contents of those folders by going to the email program, selecting folders, pressing show all folders, and clearing any items in the aforementioned folders by pulling up the menu and selecting 'empty this folder'. I was then able to successfully sync my Google account afterwards completely and without any further hassle. I hope this helps anyone else out there. This is a clearly a bug that I will be reporting to Microsoft.

Thanks, driver_king, this was the solution that solved it for me.
I have a Lumia 920 and my main MS account wasn't syncing. This caused the linked Twitter not to sync either. I have tried a lot of things including turning text message backup on and off, but nothing helped. Then luckily I found your post, following your advice I emptied all the folder that had something in them on my MF account and voilá, now it syncs!

I was getting error code 80C805E2 again today when synching to my work Exchange server on my 8x (I think the 3rd time since I got the phone). Only fix was to delete the account entirely and set it up from scratch.

Big thanks, driver_king. That did it. I think with my Hotmail account, I also had to "don't sync this folder" for all folders I had synced (default is "sent" folder only) to get it to work again. Of course, after it got fixed, I re-enabled sync this folder for sent.

Originally Posted by driver_king

From what I've found, if you have any items that are in the trash, spam, deleted, or junk, you may encounter this error. From my experience with my Gmail account, the solution to 80C805E2 was to empty any of the contents of those folders by going to the email program, selecting folders, pressing show all folders, and clearing any items in the aforementioned folders by pulling up the menu and selecting 'empty this folder'. I was then able to successfully sync my Google account afterwards completely and without any further hassle. I hope this helps anyone else out there. This is a clearly a bug that I will be reporting to Microsoft.

:( Im having the same problem. for the past week i havent been able to sync my two hotmails with my phone, The same error keeps showing up and when I try to log in thru my PC It saids im still logged in and i cant even reset it. >__< I have no clue what to do.

I'm sorry everyone but this is ridiculous! This syncing issue has been a problem for way too long for us to not have a solution by now. I've seen posts from other devices that are having the exact same problem as us. I believe it has something it do on mostly the Microsoft side and it needs to be fixed pronto! Not having all of our accounts on our devices and not having them in sync makes our phones basically some very expensive paperweights. I love windows products because of the ease of use however it seems that obviously they are either not aware of the situation or they are, don't care, or working on it. I think we need to have some sort of answer as to what Microsoft is going to do and what Nokia and other products are doing to fix this. I guarantee that out of each of us that comments there are hundreds more that don't.
So, I want a response from someone as to how this is going to be fixed. How about you guys?